prove

Definition of prove

proved

proved

proven

proving

transitive verb

1archaic: to learn or find out by experience

2a: to test the truth, validity, or genuineness of <the exception proves the rule><prove a will at probate>b: to test the worth or quality of; specifically: to compare against a standard —sometimes used with up or outc: to check the correctness of (as an arithmetic result)

3a: to establish the existence, truth, or validity of (as by evidence or logic) <prove a theorem><the charges were never proved in court>b: to demonstrate as having a particular quality or worth <the vaccine has been proven effective after years of tests><proved herself a great actress>

4: to show (oneself) to be worthy or capable <eager to prove myself in the new job>

intransitive verb

: to turn out especially after trial or test <the new drug proved effective>

provable

provableness

provably

prover

Usage Discussion of prove

The past participle proven, originally the past participle of preve, a Middle English variant of prove that survived in Scotland, has gradually worked its way into standard English over the past three and a half centuries. It seems to have first become established in legal use and to have come only slowly into literary use. Tennyson was one of its earliest frequent users, probably for metrical reasons. It was disapproved by 19th century grammarians, one of whom included it in a list of “words that are not words.” Surveys made some 50 or 60 years ago indicated that proved was about four times as frequent as proven. But our evidence from the last 30 or 35 years shows this no longer to be the case. As a past participle proven is now about as frequent as proved in all contexts. As an attributive adjective <proved or proven gas reserves>proven is much more common than proved.

Examples of prove in a sentence

The charges against him were never proved in court.

The government failed to prove its case.

It could not be proven that the suspect stole the money.

A person who is charged with a crime is considered innocent until proved guilty.

mathematicians trying to prove a theorem

To prove her point, she got out the old research.

The tests proved the vaccine to be effective.

Her second album was a hit that proved her critics wrong.

Origin and Etymology of prove

Middle English, from Anglo-French prover, pruver, from Latin probare to test, prove, from probus good, honest, from pro- for, in favor + -bus (akin to Old English bēon to be) — more at pro-, be